Former or current GM owners, post here if you have experienced a problem with your GM auto or truck with an external or internal coolant or oil leak related to the intake manifold/gaskets/mating surfaces. Also, state year,vehicle type, mileage. Curious as this seams to be a common problem with GM. I have had a few early '90's GM trucks that had exteranl leakage, my sister just had to replace the engine in a '97 S-Blazer with only 46K miles due to an internal leak.
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